Crane aerospace & electronics Power solutions
MHF+ Single, dual and triple dC/dC Converters
28 VOlT inPuT – 15 WATT
OPerating COnditiOns and CharaCteristiCs
Input Voltage Range
•
Single and dual models:
‣
16 to 40 vdC continuous
‣
MHF+281r9S 20 to 32 dC continuous
‣
50 v for up to 50 ms transient
‣
MHF+281r9S 35 v for up to 50 ms transient
•
triple models:
‣
16 to 48 vdC continuous
‣
80 v for up to 120 ms transient
synC and inhibit
Sync In
•
input frequency
‣
Single and dual models: 500 to 600 kHz
‣
triple models: 400 to 600 kHz
‣
duty cycle 40% to 60%
•
active low 0.8 v max
•
active high 4 v min, 5 v max
•
triple models: source impedance should be <100 ohms and
the transition time should be <100 nanoseconds
•
if sync is not used
‣
Single and dual models: connect to input common
‣
triple models: leave unconnected
•
referenced to input common
Inhibit:
•
active low (output disabled)
‣
Active low voltage ≤0.8 V max
- inhibit pin current
· Single and dual models: 4.0 ma max, 3.0 ma typ
· triple models: 5.0 ma max, 3.0 ma typ
‣
referenced to input common
•
active high (output enabled)
‣
Single and dual models
- open collector or unconnected
- open pin 8.5 to 12 v, 10 v typical
‣
triple models
- open collector or unconnected
- open collector interface not required if active high is
greater than 11 v and less than 40v
- open pin voltage, 11 v typical
Output Power
•
6.65 to 15 watts depending on model
Power Dissipation (Pd)
•
Single and dual models: 6 watts
•
1.9 and 3.3v single: 8 watts
•
triple models: 12 watts triple
Storage Temperature Range (Case)
•
-65°C to +150°C
Case Operating Temperature (T
C
)
•
-55°C to +125°C full power
•
-55°C to +135°C absolute
Lead Soldering Temperature (10 sec per pin)
•
300°C
Derating Output Power/Current
•
linearly from 100% at 125°C to 0% at 135°C
Output Voltage Temperature Coefficient
•
100 ppm/°C typical
•
150 ppm/°C maximum
Input to Output Capacitance
•
60 pF typical
Audio Rejection
•
50 dB typical
Isolation
•
100 megohm minimum at 500 v
Current Limit
•
Single and dual models: 115% of full load typical
•
triple models: 130% of full load typical triple
meChaniCal and envirOnmental
Size (maximum)
•
non flanged 1.460 x 1.130 x 0.330 (37.08 x 28.70 x 8.38 mm)
•
Flanged 2.005 x 1.130 x 0.330 (50.93 x 28.70 x 8.38 mm)
•
See cases e1, e2, g1 and g2 for dimensions.
Weight, flanged or unflanged (maximum)
•
Single and dual models: 30 grams
•
triple models: 35 grams
Screening:
Standard, eS or 883 (Class H). See Screening tables 1 and 2 for
more information.
Undervoltage Lockout
•
Single and dual models: 14 v input typical
•
triple models: 8.5 v input typical
Conversion Frequency (-55°C to +125°C T
C
)
•
Free run
‣
Single and dual models: 480 kHz min, 550 kHz typ,
620 kHz max
‣
triple models: 375 kHz min, 500 kHz max
www.interpoint.com
Page 3 of 23
MHF+ rev l - 20091113
INTERPOINT [ INTERPOINT CORPORATION COMPANY ]
